FABRICATION AND CHARACTERIZATION OF A FLEXIBLE PIEZOELECTRIC GENERATOR BASED ON POTASSIUM SODIUM NIOBATE (KNN) DOPED WITH LITHIUM, ANTIMONY (LISB) /PVDF COMPOSITE FILM

Abstract

In this work, we have fabricated [(0.95(K0.48Na0.52)NbO3)–(0.05)(LiSbO3)]/PVDF piezoelectric generator (PEG), whereas a polymer matrix, PVDF is employed and KNN-LiSb as a filler piezoelectric substance. The stated objectives of adding lithium and antimony to KNN powder are to improve the piezoelectric properties. The KNN-LiSb/PVDF composite films have been prepared with various concentrations of KNN-LiSb ceramic particles (0%,5%,10%,15%, and 20% in PVDF) by using the drop-casting method. The phase and structural analysis of the piezoelectric composite film was investigated by XRD and FTIR. SEM (Scanning Electron Microscopy) analysis of the morphology of composite films revealed that the ceramic particles were dispersed equally throughout the PVDF matrix. Furthermore, the prepared generator's efficiency in harvesting energy was assessed by Electrodynamic Vibrator Shaker to apply pressure, followed by an estimation of the resulting voltage and short- circuitry current. The 15% KNN-LiSb /PVDF composite film-based Piezoelectric Generator could also induce maximum resulting voltage and short-circuiting current of approx.15.47 V and 2.14 μA, respectively. The current work showed that lead-free piezoelectric ceramics can be modified with suitable dopants to provide high-performance PEG. Ultimately, the synthesized flexible piezoelectric generator's outputs indicate that there are significant possibilities for application in wearable and self-powered electronic devices